This name is a synonym of Begonia lucidissima Golding & Kareg..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 362191) with original publication details: Anales Soc. Ci. Argent. 5: 208 1878.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:105096-1.
This name was in version 1 of The Plant List, record kew-362191, and has not been changed.